Highly portable and with plenty of processing speed, the ThinkPad T23 has a lot to offer those seeking a business-oriented notebook. Consider, for example, its 1.2 GHz Pentium III chip, 48 GB hard disk, and 128 MB of RAM (expandable to 1,024 MB). A large 14.1-inch, active-matrix screen and 24x (read), 8x (write), 4x (rewrite) CD-RW drive make this system adequate in the area of entertainment as well. The installed operating system is Windows XP Professional, which adds business-oriented security and networking features to Microsoft's Windows 2000 OS.